<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title>导航滚动到一定高底后吸顶，锚点定位自动跟随</title>
		<style type="text/css">
		*{margin: 0; padding: 0;}
		.topbox{ height: 500px; background-color: #313131; }
		.section-content{ border-bottom: 5px solid #0000FF; min-height: 500px; background: #eee; width: 1200px; margin: auto; line-height: 500px; text-align: center; }
		.nav-height{ position:relative; height: 50px;}
.nav-wrap { width: 100%;height: 50px;background: #fff;}
.nav-wrap.navFix{position: fixed;top: 0;left: 0;  box-shadow: 0 0 5px rgba(0,0,0, 0.2);border-bottom:1px solid #e3e3e3\9; z-index: 99999;} 
.nav-wrap ul {padding: 0;margin: 0 auto; width: 1200px; display: block; border-bottom: 2px solid #eee;}
.nav-wrap.navFix ul{ border-bottom: 0;}
.nav-wrap li { display: inline-block; text-align: left;height: 50px; line-height: 50px; float: left;}
.nav-wrap li a {display: block;padding: 0 20px;font-size:20px; color: #333; text-decoration: none;}
.nav-wrap li a:hover{color: #4680d1;}
.nav-wrap li a.active {border-bottom:2px solid #4680d1;color: #4680d1;}
.nav-mobile {display: none;font-weight: bold;width: 100%;}
.click-me {width: 150px;height: 30px; background: #4680d1;color: white; text-align: center;line-height: 30px;}
.click-me a {display: block;color: white;}

		</style>
		<script type="text/javascript" src="js/jquery-1.js"></script>
		<script src='js/nav.js'></script>
	</head>
	<body>
		<div class="topbox"></div>
		<div class="nav-height" id="navHeight">
			<nav class="nav-wrap" id="nav-wrap">
			    <div class="nav-mobile">Click</div>
			    <ul class="clearfix">
			      <li><a class="active" href="#section1">nav1</a></li>
			      <li><a class="" href="#section2">nav2</a></li>
			      <li><a class="" href="#section3">nav3</a></li>
			      <li><a class="" href="#section4">nav4</a></li>
			    </ul>
		 	</nav>
		</div>
	 	<div id="section1" class="section-content">
		   1
	 	</div>
	 	<div id="section2" class="section-content">
		   2
	 	</div>
	 	<div id="section3" class="section-content">
		   3
	 	</div>
	 	<div id="section4" class="section-content">
		   4
	 	</div>
	 	<div style="height: 1000px;background: #f5f5f5;">footer</div>
	 	<!--内容信息导航吸顶及锚点引入JS-->
		
        <script>
		//内容信息导航吸顶
			$(document).ready(function(){ 
			var navHeight= $("#navHeight").offset().top; 
			var navFix=$("#nav-wrap"); 
			$(window).scroll(function(){ 
				if($(this).scrollTop()>navHeight){ 
					navFix.addClass("navFix"); 
				} 
				else{ 
					navFix.removeClass("navFix"); 
				} 
				}) 
			})
		//内容信息导航锚点
		   $('.nav-wrap').navScroll({
		      mobileDropdown: true,
		      mobileBreakpoint: 768,
		      scrollSpy: true
		    });
		
		    $('.click-me').navScroll({
		      navHeight: 0
		    });
		
		    $('.nav-wrap').on('click', '.nav-mobile', function (e) {
		      e.preventDefault();
		      $('.nav-wrap ul').slideToggle('fast');
		    });
		</script>
	</body>
</html>
